helm: add noHooks option

lib/helm/chart2json.nix

@@ -20,6 +20,8 @@ with lib;
     kubeVersion ? null,
     # whether to include CRD
     includeCRDs ? false,
+    # whether to include hooks
+    noHooks ? false,
   }: let
     valuesJsonFile = builtins.toFile "${name}-values.json" (builtins.toJSON values);
   in
@@ -32,6 +34,7 @@ with lib;
           ${optionalString (namespace != null) "--namespace ${namespace}"} \
           ${optionalString (values != {}) "-f ${valuesJsonFile}"} \
           ${optionalString includeCRDs "--include-crds"} \
+          ${optionalString noHooks "--no-hooks"} \
           ${chart} >resources.yaml
 
         # split multy yaml file into multiple files

modules/helm.nix

@@ -95,6 +95,17 @@ in {
             default = false;
           };
 
+          noHooks = mkOption {
+            description = ''
+              Wether to include Helm hooks.
+
+              Without this all hooks run immediately on apply since we are bypassing the Helm CLI.
+              However, some charts only have minor validation hooks (e.g., upgrade version skew validation) and are safe to ignore.
+            '';
+            type = types.bool;
+            default = false;
+          };
+
           objects = mkOption {
             description = "Generated kubernetes objects";
             type = types.listOf types.attrs;
@@ -109,7 +120,7 @@ in {
         ];
 
         config.objects = importJSON (helm.chart2json {
-          inherit (config) chart name namespace values kubeVersion includeCRDs;
+          inherit (config) chart name namespace values kubeVersion includeCRDs noHooks;
         });
       }));
       default = {};